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Wang X, Li QQ, Tang YX, Li Y, Zhang L, Xu FF, Fu XL, Ye K, Ma JQ, Guo SM, Ma FY, Liu ZY, Shi XH, Li XM, Sun HM, Wu Y, Zhang WY, Ye LH. Oncoprotein LAMTOR5-mediated CHOP silence via DNA hypermethylation and miR-182/miR-769 in promotion of liver cancer growth. Acta Pharmacol Sin 2024:10.1038/s41401-024-01310-y. [PMID: 38942954 DOI: 10.1038/s41401-024-01310-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2024] [Accepted: 05/08/2024] [Indexed: 06/30/2024] Open
Abstract
C/EBP homologous protein (CHOP) triggers the death of multiple cancers via endoplasmic reticulum (ER) stress. However, the function and regulatory mechanism of CHOP in liver cancer remain elusive. We have reported that late endosomal/lysosomal adapter, mitogen-activated protein kinase and mTOR activator 5 (LAMTOR5) suppresses apoptosis in various cancers. Here, we show that the transcriptional and posttranscriptional inactivation of CHOP mediated by LAMTOR5 accelerates liver cancer growth. Clinical bioinformatic analysis revealed that the expression of CHOP was low in liver cancer tissues and that its increased expression predicted a good prognosis. Elevated CHOP contributed to destruction of LAMTOR5-induced apoptotic suppression and proliferation. Mechanistically, LAMTOR5-recruited DNA methyltransferase 1 (DNMT1) to the CpG3 region (-559/-429) of the CHOP promoter and potentiated its hypermethylation to block its interaction with general transcription factor IIi (TFII-I), resulting in its inactivation. Moreover, LAMTOR5-enhanced miR-182/miR-769 reduced CHOP expression by targeting its 3'UTR. Notably, lenvatinib, a first-line targeted therapy for liver cancer, could target the LAMTOR5/CHOP axis to prevent liver cancer progression. Accordingly, LAMTOR5-mediated silencing of CHOP via the regulation of ER stress-related apoptosis promotes liver cancer growth, providing a theoretical basis for the use of lenvatinib for the treatment of liver cancer.
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Affiliation(s)
- Xue Wang
- State Key Laboratory of Medicinal Chemical Biology, Tianjin Key Laboratory of Protein Sciences, Department of Biochemistry and Molecular Biology, College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Qian-Qian Li
- State Key Laboratory of Medicinal Chemical Biology, Tianjin Key Laboratory of Protein Sciences, Department of Biochemistry and Molecular Biology, College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Yan-Xin Tang
- State Key Laboratory of Medicinal Chemical Biology, Tianjin Key Laboratory of Protein Sciences, Department of Biochemistry and Molecular Biology, College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Ye Li
- State Key Laboratory of Medicinal Chemical Biology, Tianjin Key Laboratory of Protein Sciences, Department of Biochemistry and Molecular Biology, College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Lu Zhang
- State Key Laboratory of Medicinal Chemical Biology, Tianjin Key Laboratory of Protein Sciences, Department of Biochemistry and Molecular Biology, College of Life Sciences, Nankai University, Tianjin, 300071, China
- Chinese Academy of Medical Sciences & Peking Union Medical College Institute of Biomedical Engineering, Tianjin, 300192, China
| | - Fei-Fei Xu
- State Key Laboratory of Medicinal Chemical Biology, Tianjin Key Laboratory of Protein Sciences, Department of Biochemistry and Molecular Biology, College of Life Sciences, Nankai University, Tianjin, 300071, China
- Institute of Radiation Medicine, Peking Union Medical College & Chinese Academy of Medical Sciences, Tianjin, 300192, China
| | - Xue-Li Fu
- State Key Laboratory of Medicinal Chemical Biology, Tianjin Key Laboratory of Protein Sciences, Department of Biochemistry and Molecular Biology, College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Kai Ye
- State Key Laboratory of Medicinal Chemical Biology, Tianjin Key Laboratory of Protein Sciences, Department of Biochemistry and Molecular Biology, College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Jia-Qi Ma
- State Key Laboratory of Medicinal Chemical Biology, Tianjin Key Laboratory of Protein Sciences, Department of Biochemistry and Molecular Biology, College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Shi-Man Guo
- State Key Laboratory of Medicinal Chemical Biology, Tianjin Key Laboratory of Protein Sciences, Department of Biochemistry and Molecular Biology, College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Fang-Yuan Ma
- State Key Laboratory of Medicinal Chemical Biology, Tianjin Key Laboratory of Protein Sciences, Department of Biochemistry and Molecular Biology, College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Zhi-Yu Liu
- State Key Laboratory of Medicinal Chemical Biology, Tianjin Key Laboratory of Protein Sciences, Department of Biochemistry and Molecular Biology, College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Xu-He Shi
- State Key Laboratory of Medicinal Chemical Biology, Tianjin Key Laboratory of Protein Sciences, Department of Biochemistry and Molecular Biology, College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Xian-Meng Li
- State Key Laboratory of Medicinal Chemical Biology, Tianjin Key Laboratory of Protein Sciences, Department of Biochemistry and Molecular Biology, College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Hui-Min Sun
- State Key Laboratory of Medicinal Chemical Biology, Tianjin Key Laboratory of Protein Sciences, Department of Biochemistry and Molecular Biology, College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Yue Wu
- State Key Laboratory of Medicinal Chemical Biology, Tianjin Key Laboratory of Protein Sciences, Department of Biochemistry and Molecular Biology, College of Life Sciences, Nankai University, Tianjin, 300071, China
- Center for Cell Structure and Function, Shandong Provincial Key Laboratory of Animal Resistance Biology, Collaborative Innovation Center of Cell Biology in Universities of Shandong, College of Life Sciences, Shandong Normal University, Jinan, 250014, China
| | - Wei-Ying Zhang
- State Key Laboratory of Medicinal Chemical Biology, Tianjin Key Laboratory of Protein Sciences, Department of Biochemistry and Molecular Biology, College of Life Sciences, Nankai University, Tianjin, 300071, China.
| | - Li-Hong Ye
- State Key Laboratory of Medicinal Chemical Biology, Tianjin Key Laboratory of Protein Sciences, Department of Biochemistry and Molecular Biology, College of Life Sciences, Nankai University, Tianjin, 300071, China.
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Cheng M, Fan X, He M, Dai X, Liu X, Hong J, Zhang L, Liao L. Identification of an endoplasmic reticulum stress-related prognostic risk model with excellent prognostic and clinical value in oral squamous cell carcinoma. Aging (Albany NY) 2023; 15:10010-10030. [PMID: 37647077 PMCID: PMC10599730 DOI: 10.18632/aging.204983] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Accepted: 07/20/2023] [Indexed: 09/01/2023]
Abstract
BACKGROUND Recently, endoplasmic reticulum stress related gene (ERS) markers have performed very well in predicting the prognosis of tumor patients. METHODS The differentially expressed genes in Oral squamous cell carcinoma (OSCC) were obtained from TCGA and GTEx database. Three prognosis-related and differentially expressed ERSs were screened out by Least Absolute Selection and Shrinkage Operator (Lasso) regression to construct a prognostic risk model. Receiver Operating Characteristic Curve (ROC), riskplots and survival curves were used to verify the model's accuracy in predicting prognosis. Multi-omics analysis of immune infiltration, gene mutation, and stem cell characteristics were performed to explore the possible mechanism of OSCC. Finally, we discussed the model's clinical application value from the perspective of drug sensitivity. RESULTS Three genes used in the model (IBSP, RDM1, RBP4) were identified as prognostic risk factors. Bioinformatics analysis, tissue and cell experiments have fully verified the abnormal expression of these three genes in OSCC. Multiple validation methods and internal and external datasets confirmed the model's excellent performance in predicting and discriminating prognosis. Cox regression analysis identified risk score as an independent predictor of prognosis. Multi-omics analysis found strong correlations between risk scores and immune cells, cell stemness index, and tumor mutational burden (TMB). It was also observed that the risk score was closely related to the half maximal inhibitory concentration of docetaxel, gefitinib and erlotinib. The excellent performance of the nomogram has been verified by various means. CONCLUSION A prognostic model with high clinical application value was constructed. Immune cells, cellular stemness, and TMB may be involved in the progression of OSCC.
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Affiliation(s)
- Mingyang Cheng
- The Affiliated Stomatological Hospital of Nanchang University, Nanchang, Jiangxi, China
- The Key Laboratory of Oral Biomedicine, Nanchang, Jiangxi, China
- Jiangxi Clinical Research Center for Oral Diseases, Nanchang, Jiangxi, China
- Clinical Medical Research Center Affiliated Hospital of Jinggangshan University, Medical Department of Jinggangshan University, Ji'An, Jiangxi, China
| | - Xin Fan
- The Affiliated Stomatological Hospital of Nanchang University, Nanchang, Jiangxi, China
- The Key Laboratory of Oral Biomedicine, Nanchang, Jiangxi, China
- Jiangxi Clinical Research Center for Oral Diseases, Nanchang, Jiangxi, China
| | - Mu He
- The Stomatology College of Nanchang University, Nanchang, Jiangxi, China
| | - Xianglin Dai
- The Affiliated Stomatological Hospital of Nanchang University, Nanchang, Jiangxi, China
- The Key Laboratory of Oral Biomedicine, Nanchang, Jiangxi, China
- Jiangxi Clinical Research Center for Oral Diseases, Nanchang, Jiangxi, China
| | - Xiaoli Liu
- The Affiliated Stomatological Hospital of Nanchang University, Nanchang, Jiangxi, China
- The Key Laboratory of Oral Biomedicine, Nanchang, Jiangxi, China
- Jiangxi Clinical Research Center for Oral Diseases, Nanchang, Jiangxi, China
| | - Jinming Hong
- The Affiliated Stomatological Hospital of Nanchang University, Nanchang, Jiangxi, China
- The Key Laboratory of Oral Biomedicine, Nanchang, Jiangxi, China
- Jiangxi Clinical Research Center for Oral Diseases, Nanchang, Jiangxi, China
| | - Laiyu Zhang
- The Affiliated Stomatological Hospital of Nanchang University, Nanchang, Jiangxi, China
- The Key Laboratory of Oral Biomedicine, Nanchang, Jiangxi, China
- Jiangxi Clinical Research Center for Oral Diseases, Nanchang, Jiangxi, China
| | - Lan Liao
- The Affiliated Stomatological Hospital of Nanchang University, Nanchang, Jiangxi, China
- The Key Laboratory of Oral Biomedicine, Nanchang, Jiangxi, China
- Jiangxi Clinical Research Center for Oral Diseases, Nanchang, Jiangxi, China
- Clinical Medical Research Center Affiliated Hospital of Jinggangshan University, Medical Department of Jinggangshan University, Ji'An, Jiangxi, China
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Yuan Y, Jiao P, Wang Z, Chen M, Du H, Xu L, Xu J, Dai Y, Wu FG, Zhang Y, Wu H. Endoplasmic reticulum stress promotes the release of exosomal PD-L1 from head and neck cancer cells and facilitates M2 macrophage polarization. Cell Commun Signal 2022; 20:12. [PMID: 35090495 PMCID: PMC8796490 DOI: 10.1186/s12964-021-00810-2] [Citation(s) in RCA: 33] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2021] [Accepted: 11/26/2021] [Indexed: 12/17/2022] Open
Abstract
Background Endoplasmic reticulum (ER) stress has been found to foster the escape of cancer cells from immune surveillance and upregulate PD-L1 expression. However, the underlying mechanisms are unknown. Methods While analyzing the protein levels using immunofluorescence and Western blotting, the RNA levels were measured using qRT-PCR. Ten injection of exosomes into six-week-old nude mice was made through the tail vein once every other day in total. Results The expression of certain ER stress markers such as PERK (PKR-like endoplasmic reticulum kinase), ATF6 (activating transcription factor 6), and GRP78 (glucose-regulated protein 78), was found to be upregulated in the oral squamous cell carcinoma (OSCC) tissues and related to poor overall survival. There is a positive relationship between the extent of ER stress-related proteins and a cluster of PD-L1 expression and macrophage infiltration among the OSCC tissues. Further, incubation with exosomes derived from ER-stressed HN4 cells (Exo-ER) was found to upregulate PD-L1 extents in macrophages in vitro and in vivo, and macrophage polarization toward the M2 subtype was promoted by upregulating PD-L1. Conclusions ER stress causes OSCC cells to secrete exosomal PD-L1 and upregulates PD-L1 expression in macrophages to drive M2 macrophage polarization. The delineation of a new exosome-modulated mechanism was made for OSCC–macrophage crosstalk driving tumor development and to be examined for its therapeutic use. Graphical abstract Exosomal PD-L1 secreted by ER-stressed OSCC cells promoted M2 macrophage polarization. ![]() Video Abstract.
Supplementary Information The online version contains supplementary material available at 10.1186/s12964-021-00810-2.
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Wang Z, Jiao P, Zhong Y, Ji H, Zhang Y, Song H, Du H, Ding X, Wu H. The Endoplasmic Reticulum-Stressed Head and Neck Squamous Cell Carcinoma Cells Induced Exosomal miR-424-5p Inhibits Angiogenesis and Migration of Humanumbilical Vein Endothelial Cells Through LAMC1-Mediated Wnt/β-Catenin Signaling Pathway. Cell Transplant 2022; 31:9636897221083549. [PMID: 35315295 PMCID: PMC8943634 DOI: 10.1177/09636897221083549] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Under endoplasmic reticulum (ER) stress, tumor plays multifaceted roles in
endothelial cell dysfunction through secreting exosomal miRNAs. However, for the
head and neck squamous cell carcinoma (HNSCC), it is still unclear about the
impact of ER-stressed HNSCC cell derived exosomes on vascular endothelial cells.
To address this gap, herein, systemic research was conducted including isolation
and characterization of ER-stressed HNSCC cell (HN4 cell line as an in
vitro model) derived exosomes, identification of regulatory
exosomal miRNAs, target exploration and downstream signaling pathway
investigation of exosomal miRNAs in human umbilical vein endothelial cell
(HUVEC). ER-stressed HN4 cell-derived exosomes inhibited angiogenesis and
migration of HUVEC cells in vitro. Furthermore, RNA-seq
analysis demonstrated that miR-424-5p was highly upregulated in ER-stressed HN4
cell-derived exosomes. Through matrigel tube formation and transwell assays of
HUVEC cells, miR-424-5p displayed great capabilities on inhibiting angiogenesis
and migration. Finally, based on western blot and luciferase reporter, it was
demonstrated that LAMC1 is the target of miR-424-5p which could inhibit the
angiogenesis and migration of HUVEC cells by repressing the LAMC1-mediated
Wnt/β-catenin signaling pathway. ER-stressed HNSCC cell-induced exosomal
miR-424-5p inhibits angiogenesis and migration of HUVEC cells through
LAMC1-mediated Wnt/β-catenin signaling pathway. This study offers a new insight
for understanding the complicated mechanism behind ER-stress induced
anti-angiogenesis of HNSCC.
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Affiliation(s)
- Zeyu Wang
- Department of Oral and Maxillofacial Surgery, Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing, China.,Jiangsu Key Laboratory of Oral Disease, Nanjing Medical University, Nanjing, China
| | - Pengfei Jiao
- Department of Oral and Maxillofacial Surgery, Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing, China.,Jiangsu Key Laboratory of Oral Disease, Nanjing Medical University, Nanjing, China
| | - Yi Zhong
- Department of General Dentistry, Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing, China
| | - Huan Ji
- Department of Oral and Maxillofacial Surgery, Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing, China.,Jiangsu Key Laboratory of Oral Disease, Nanjing Medical University, Nanjing, China
| | - Yaqin Zhang
- Key Laboratory of Human Functional Genomics of Jiangsu Province, Department of Biochemistry and Molecular Biology, Nanjing Medical University, Nanjing, China
| | - Haiyang Song
- Jiangsu Key Laboratory of Oral Disease, Nanjing Medical University, Nanjing, China.,Department of General Dentistry, Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing, China
| | - Hongming Du
- Department of Oral and Maxillofacial Surgery, Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing, China
| | - Xu Ding
- Department of Oral and Maxillofacial Surgery, Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing, China
| | - Heming Wu
- Department of Oral and Maxillofacial Surgery, Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing, China
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5
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Zhao T, Du J, Zeng H. Interplay between endoplasmic reticulum stress and non-coding RNAs in cancer. J Hematol Oncol 2020; 13:163. [PMID: 33267910 PMCID: PMC7709275 DOI: 10.1186/s13045-020-01002-0] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2020] [Accepted: 11/17/2020] [Indexed: 12/11/2022] Open
Abstract
To survive, cancer cells are subjected to various internal and external adverse factors, including genetic mutations, hypoxia, nutritional deficiencies, and drug toxicity. All of these factors result in the accumulation of unfolded proteins in the endoplasmic reticulum, which leads to a condition termed endoplasmic reticulum stress (ER stress) and triggers the unfolded protein response (UPR). UPR downstream components strictly control transcription and translation reprogramming to ensure selective gene expression, including that of non-coding RNA (ncRNAs), to adapt to adverse environments. NcRNAs, including microRNAs (miRNAs), long non-coding RNAs (lncRNAs), and circular RNAs (circRNAs), play important roles in regulating target gene expression and protein translation, and their aberrant expression is related to tumor development. Dysregulation of ncRNAs is involved in the regulation of various cellular characteristics of cancer cells, including growth, apoptosis, metastasis, angiogenesis, drug sensitivity, and tumor stem cell properties. Notably, ncRNAs and ER stress can regulate each other and collaborate to determine the fate of tumor cells. Therefore, investigating the interaction between ER stress and ncRNAs is crucial for developing effective cancer treatment and prevention strategies. In this review, we summarize the ER stress-triggered UPR signaling pathways involved in carcinogenesis followed by the mutual regulation of ER stress and ncRNAs in cancer, which provide further insights into the understanding of tumorigenesis and therapeutic strategies.
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Affiliation(s)
- Tianming Zhao
- Department of Hematology, The First Affiliated Hospital of Jinan University, Guangzhou, 510632, Guangdong, China
| | - Juan Du
- Department of Hematology, The First Affiliated Hospital of Jinan University, Guangzhou, 510632, Guangdong, China
| | - Hui Zeng
- Department of Hematology, The First Affiliated Hospital of Jinan University, Guangzhou, 510632, Guangdong, China.
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6
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Yao X, Tu Y, Xu Y, Guo Y, Yao F, Zhang X. Endoplasmic reticulum stress-induced exosomal miR-27a-3p promotes immune escape in breast cancer via regulating PD-L1 expression in macrophages. J Cell Mol Med 2020; 24:9560-9573. [PMID: 32672418 PMCID: PMC7520328 DOI: 10.1111/jcmm.15367] [Citation(s) in RCA: 93] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Revised: 02/03/2020] [Accepted: 04/22/2020] [Indexed: 12/11/2022] Open
Abstract
Immune escape of breast cancer cells contributes to breast cancer pathogenesis. Tumour microenvironment stresses that disrupt protein homeostasis can produce endoplasmic reticulum (ER) stress. The miRNA‐mediated translational repression of mRNAs has been extensively studied in regulating immune escape and ER stress in human cancers. In this study, we identified a novel microRNA (miR)‐27a‐3p and investigated its mechanistic role in promoting immune evasion. The binding affinity between miR‐27a‐3p and MAGI2 was predicted using bioinformatic analysis and verified by dual‐luciferase reporter assay. Ectopic expression and inhibition of miR‐27a‐3p in breast cancer cells were achieved by transduction with mimics and inhibitors. Besides, artificial modulation of MAGI2 and PTEN was done to explore their function in ER stress and immune escape of cancer cells. Of note, exosomes were derived from cancer cells and co‐cultured with macrophages for mechanistic studies. The experimental data suggested that ER stress biomarkers including GRP78, PERK, ATF6, IRE1α and PD‐L1 were overexpressed in breast cancer tissues relative to paracancerous tissues. Endoplasmic reticulum stress promoted exosome secretion and elevated exosomal miR‐27a‐3p expression. Elevation of miR‐27a‐3p and PD‐L1 levels in macrophages was observed in response to exosomes‐overexpressing miR‐27a‐3p in vivo and in vitro. miR‐27a‐3p could target and negatively regulate MAGI2, while MAGI2 down‐regulated PD‐L1 by up‐regulating PTEN to inactivate PI3K/AKT signalling pathway. Less CD4+, CD8+ T cells and IL‐2, and T cells apoptosis were observed in response to co‐culture of macrophages and CD3+ T cells. Conjointly, exosomal miR‐27a‐3p promotes immune evasion by up‐regulating PD‐L1 via MAGI2/PTEN/PI3K axis in breast cancer.
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Affiliation(s)
- Xiaoli Yao
- Department of Breast and Thyroid Surgery, Renmin Hospital of Wuhan University, Wuhan, China
| | - Yi Tu
- Department of Breast and Thyroid Surgery, Renmin Hospital of Wuhan University, Wuhan, China
| | - Yulin Xu
- Department of Breast and Thyroid Surgery, Renmin Hospital of Wuhan University, Wuhan, China
| | - Yueyue Guo
- Department of Breast and Thyroid Surgery, Renmin Hospital of Wuhan University, Wuhan, China
| | - Feng Yao
- Department of Breast and Thyroid Surgery, Renmin Hospital of Wuhan University, Wuhan, China
| | - Xinghua Zhang
- Department of Thoracic Surgery, Renmin Hospital of Wuhan University, Wuhan, China
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7
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Liu J, Fan L, Yu H, Zhang J, He Y, Feng D, Wang F, Li X, Liu Q, Li Y, Guo Z, Gao B, Wei W, Wang H, Sun G. Endoplasmic Reticulum Stress Causes Liver Cancer Cells to Release Exosomal miR-23a-3p and Up-regulate Programmed Death Ligand 1 Expression in Macrophages. Hepatology 2019; 70:241-258. [PMID: 30854665 PMCID: PMC6597282 DOI: 10.1002/hep.30607] [Citation(s) in RCA: 255] [Impact Index Per Article: 51.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Accepted: 03/05/2019] [Indexed: 02/06/2023]
Abstract
Endoplasmic reticulum (ER) stress promotes tumor cell escape from immunosurveillance. However, the underlying mechanisms remain unknown. We hypothesized that ER stress induces hepatocellular carcinoma (HCC) cells to release exosomes, which attenuate antitumor immunity by modulating the expression of programmed death ligand 1 (PD-L1) in macrophages. In this study, we demonstrated that expression of several ER stress markers (glucose-regulated protein 78, activating transcription factor 6, protein kinase R-like ER kinase, and inositol-requiring enzyme 1α) was up-regulated in HCC tissues and negatively correlated with the overall survival and clinicopathological scores in patients with HCC. Expression of ER stress-related proteins positively correlated with CD68+ macrophage recruitment and PD-L1 expression in HCC tissues. High-throughput sequencing analysis identified miR-23a-3p as one of the most abundant microRNAs in exosomes derived from tunicamycin (TM)-treated HCC cells (Exo-TMs). miR-23a-3p levels in HCC tissues negatively correlated with overall survival. Treatment with Exo-TMs up-regulated the expression of PD-L1 in macrophages in vitro and in vivo. Bioinformatics analysis suggests that miR-23a-3p regulates PD-L1 expression through the phosphatase and tensin homolog (PTEN)-phosphatidylinositol 3-kinase-protein kinase B (AKT) pathway. This notion was confirmed by in vitro transfection and coculture experiments, which revealed that miR-23a-3p inhibited PTEN expression and subsequently elevated phosphorylated AKT and PD-L1 expression in macrophages. Finally, coculture of T cells with Exo-TM-stimulated macrophages decreased CD8+ T-cell ratio and interleukin-2 production but increased T-cell apoptosis in vitro. Conclusion: ER-stressed HCC cells release exosomes to up-regulate PD-L1 expression in macrophages, which subsequently inhibits T-cell function through an exosome miR-23a-PTEN-AKT pathway. Our findings provide insight into the mechanism how tumor cells escape from antitumor immunity.
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Affiliation(s)
- Jiatao Liu
- Department of Oncology, the First Affiliated Hospital of Anhui Medical University, Hefei, China,Department of Pharmacy, the First Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Lulu Fan
- Department of Oncology, the First Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Hanqing Yu
- Department of Oncology, the First Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Ju Zhang
- Department of Oncology, the First Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Yong He
- Laboratory of Liver Diseases, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, MD
| | - Dechun Feng
- Laboratory of Liver Diseases, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, MD
| | - Fang Wang
- Department of Oncology, the First Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Xiaoqiu Li
- Department of Oncology, the First Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Qingqing Liu
- Department of Oncology, the First Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Yuhuan Li
- Department of Oncology, the First Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Zhenli Guo
- Department of Oncology, the First Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Bin Gao
- Laboratory of Liver Diseases, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, MD
| | - Wei Wei
- Institute of Clinical Pharmacology, Anhui Medical University, Hefei, China
| | - Hua Wang
- Department of Oncology, the First Affiliated Hospital of Anhui Medical University, Hefei, China,Institute for Liver Diseases of Anhui Medical University, Hefei, China,Correspondence to:Guoping Sun, M.D., Ph.D., Department of Oncology, the First Affiliated Hospital of Anhui Medical University, 218 Jixi Road, Hefei, Anhui Province, 230022, China. Tel.: 13805609309; , Hua Wang, M.D., Ph.D., Department of Oncology, the First Affiliated Hospital of Anhui Medical University, 218 Jixi Road, Hefei, Anhui Province, 230022, China. Tel.: 13505690896;
| | - Guoping Sun
- Department of Oncology, the First Affiliated Hospital of Anhui Medical University, Hefei, China,Correspondence to:Guoping Sun, M.D., Ph.D., Department of Oncology, the First Affiliated Hospital of Anhui Medical University, 218 Jixi Road, Hefei, Anhui Province, 230022, China. Tel.: 13805609309; , Hua Wang, M.D., Ph.D., Department of Oncology, the First Affiliated Hospital of Anhui Medical University, 218 Jixi Road, Hefei, Anhui Province, 230022, China. Tel.: 13505690896;
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8
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Li C, Fan Q, Quan H, Nie M, Luo Y, Wang L. The three branches of the unfolded protein response exhibit differential significance in breast cancer growth and stemness. Exp Cell Res 2018; 367:170-185. [PMID: 29601799 DOI: 10.1016/j.yexcr.2018.03.033] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2017] [Revised: 03/14/2018] [Accepted: 03/25/2018] [Indexed: 01/28/2023]
Abstract
The unfolded protein response (UPR) is widely activated in cancers. The mammalian UPR encompasses three signaling branches, namely inositol-requiring enzyme-1α (IRE1α), protein kinase R (PKR)-like endoplasmic reticulum kinase (PERK) and activating transcription factor 6α (ATF6α). The functional significance of each branch in tumorigenesis is incompletely understood, especially in cancer stem cells (CSCs). Here, we report that inhibition and silencing of the three UPR sensors has differential effects on breast cancer growth and the CSC population. The levels of PERK and ATF6α strongly correlate with the expression of sex determining region Y (SRY)-box 2 (SOX2), a pluripotency regulator, in human breast cancer tissues. UPR activation is also elevated in the CSC-enriched mammospheres. Inhibition of the UPR sensors or excess ER stress markedly reduces the formation and maintenance of mammospheres, suggesting that an appropriate level of UPR activation is critical for the CSC survival. Mechanistically, transcription factors from UPR and pluripotency pathways interact and reciprocally influence each other. A transcription modulator, CCAAT-enhancer-binding protein delta (C/EBPδ), interacts with pluripotency regulator, SOX2, and UPR transcription factors, thus likely serving as a link to coordinate UPR and pluripotency maintenance in CSCs. Our findings demonstrate that UPR is critical for both cancer growth and pluripotency, and highlight the differential role and complexity of the three UPR branches in tumorigenesis.
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Affiliation(s)
- Chuang Li
- Department of Physiology, Institute of Basic Medical Sciences, School of Basic Medicine Peking Union Medical College, Chinese Academy of Medical Sciences, 5 Dong Dan San Tiao, Beijing 100005, China
| | - Qianqian Fan
- Department of Physiology, Institute of Basic Medical Sciences, School of Basic Medicine Peking Union Medical College, Chinese Academy of Medical Sciences, 5 Dong Dan San Tiao, Beijing 100005, China
| | - Hongyang Quan
- Department of Physiology, Institute of Basic Medical Sciences, School of Basic Medicine Peking Union Medical College, Chinese Academy of Medical Sciences, 5 Dong Dan San Tiao, Beijing 100005, China
| | - Meng Nie
- Department of Physiology, Institute of Basic Medical Sciences, School of Basic Medicine Peking Union Medical College, Chinese Academy of Medical Sciences, 5 Dong Dan San Tiao, Beijing 100005, China
| | - Yunping Luo
- Department of Immunology, Institute of Basic Medical Sciences, School of Basic Medicine Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China
| | - Lin Wang
- Department of Physiology, Institute of Basic Medical Sciences, School of Basic Medicine Peking Union Medical College, Chinese Academy of Medical Sciences, 5 Dong Dan San Tiao, Beijing 100005, China.
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Obacz J, Avril T, Rubio-Patiño C, Bossowski JP, Igbaria A, Ricci JE, Chevet E. Regulation of tumor-stroma interactions by the unfolded protein response. FEBS J 2017; 286:279-296. [PMID: 29239107 DOI: 10.1111/febs.14359] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Revised: 11/16/2017] [Accepted: 12/07/2017] [Indexed: 02/06/2023]
Abstract
The unfolded protein response (UPR) is a conserved adaptive pathway that helps cells cope with the protein misfolding burden within the endoplasmic reticulum (ER). Imbalance between protein folding demand and capacity in the ER leads to a situation called ER stress that is often observed in highly proliferative and secretory tumor cells. As such, activation of the UPR signaling has emerged as a key adaptive mechanism promoting cancer progression. It is becoming widely acknowledged that, in addition to its intrinsic effect on tumor biology, the UPR can also regulate tumor microenvironment. In this review, we discuss how the UPR coordinates the crosstalk between tumor and stromal cells, such as endothelial cells, normal parenchymal cells, and immune cells. In addition, we further describe the involvement of ER stress signaling in the response to current treatments as well as its impact on antitumor immunity mainly driven by immunogenic cell death. Finally, in this context, we discuss the relevance of targeting ER stress/UPR signaling as a potential anticancer approach.
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Affiliation(s)
- Joanna Obacz
- Inserm U1242 'Chemistry, Oncogenesis, Stress & Signaling', Université de Rennes, Rennes, France.,Centre de Lutte Contre le Cancer Eugene Marquis, Rennes, France
| | - Tony Avril
- Inserm U1242 'Chemistry, Oncogenesis, Stress & Signaling', Université de Rennes, Rennes, France.,Centre de Lutte Contre le Cancer Eugene Marquis, Rennes, France
| | | | | | - Aeid Igbaria
- Department of Medicine, University of California, San Francisco, San Francisco, CA, USA
| | | | - Eric Chevet
- Inserm U1242 'Chemistry, Oncogenesis, Stress & Signaling', Université de Rennes, Rennes, France.,Centre de Lutte Contre le Cancer Eugene Marquis, Rennes, France
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10
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Krem MM, Yan J. To b(ortezomib) or not to be: the stroma's the thing. J Pathol 2016; 240:123-5. [PMID: 27340009 PMCID: PMC5037003 DOI: 10.1002/path.4763] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2016] [Revised: 06/13/2016] [Accepted: 06/20/2016] [Indexed: 11/11/2022]
Abstract
The proteasome inhibitor bortezomib has been widely used to treat patients with multiple myeloma (MM). However, some patients show primary or secondary resistance. In recent work published in The Journal of Pathology, Beyar-Katz et al demonstrate that bortezomib treatment stimulates a host inflammatory response, which in turn promotes MM cell migration, viability, and proliferation. These effects appear to be mediated by pro-inflammatory M1-like stromal macrophages partly via secretion of cytokine IL-16. These unexpected findings imply that the binary M1/M2 definition of macrophages may not accurately describe the complexity and heterogeneity of macrophages associated with MM tumour growth and progression, and further suggest that bortezomib treatment stimulates host-driven tumour-promoting activity in addition to its cytotoxic activity, thus leading to potential bortezomib resistance in MM patients. Understanding the underlying mechanisms may identify novel targets to overcome or prevent bortezomib resistance. Copyright © 2016 Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.
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Affiliation(s)
- Maxwell M Krem
- Division of Blood and Marrow Transplantation, Department of Medicine, James Graham Brown Cancer Center, University of Louisville School of Medicine, Louisville, KY, USA
| | - Jun Yan
- Division of Blood and Marrow Transplantation, Department of Medicine, James Graham Brown Cancer Center, University of Louisville School of Medicine, Louisville, KY, USA.
- Division of Hematology/Oncology, Department of Medicine, James Graham Brown Cancer Center, University of Louisville School of Medicine, Louisville, KY, USA.
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11
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Dandekar A, Mendez R, Zhang K. Cross talk between ER stress, oxidative stress, and inflammation in health and disease. Methods Mol Biol 2015; 1292:205-14. [PMID: 25804758 DOI: 10.1007/978-1-4939-2522-3_15] [Citation(s) in RCA: 268] [Impact Index Per Article: 29.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
In mammals, endoplasmic reticulum (ER) stress, oxidative stress, and inflammatory responses compose the major defense networks that help the cells adapt to and survive stress conditions caused by biochemical, physiological and pathological stimuli. However, chronic ER stress, oxidative stress, or inflammation have been found to be associated with the initiation and progression of a variety of human diseases in the modern world. Under many pathophysiologic conditions, ER stress response, oxidative stress, and inflammatory responses are integrated and amplified in specialized cell types to facilitate the progression of disease. In the past few decades, ER stress response, oxidative stress, and inflammation as well as their interactive relationships have been hot research topics in biomedicine. In this review, we summarize the recent advance in our understanding of the cross talk between ER stress response, oxidative stress, and inflammation in immunity and in inflammatory and metabolic diseases.
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Affiliation(s)
- Aditya Dandekar
- Department of Immunology and Microbiology, Karmanos Cancer Institute, Wayne State University School of Medicine, 3202 Scott Hall, 540 East Canfield, Detroit, MI, 48201, USA
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12
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Saito RDF, Tortelli TC, Jacomassi MD, Otake AH, Chammas R. Emerging targets for combination therapy in melanomas. FEBS Lett 2015; 589:3438-48. [PMID: 26450371 DOI: 10.1016/j.febslet.2015.09.022] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2015] [Revised: 09/25/2015] [Accepted: 09/25/2015] [Indexed: 12/21/2022]
Abstract
Cutaneous melanomas are often difficult to treat when diagnosed in advanced stages. Melanoma cells adapt to survive in extreme environmental conditions and are among the tumors with larger genomic instability. Here we discuss some intrinsic and extrinsic mechanisms of resistance of melanoma cells to both conventional and target therapies, such as autophagy, adaptation to endoplasmic reticulum stress, metabolic reprogramming, mechanisms of tumor repopulation and the role of extracellular vesicles in this later phenomenon. These biological processes are potentially targetable and thus provide a platform for research and discovery of new drugs for combination therapy to manage melanoma patient treatment.
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Affiliation(s)
- Renata de Freitas Saito
- Center for Translational Research in Oncology (LIM24), Dept. of Radiology and Oncology, Faculdade de Medicina da Universidade de São Paulo and Instituto do Câncer do Estado de São Paulo, Brazil
| | - Tharcísio Citrângulo Tortelli
- Center for Translational Research in Oncology (LIM24), Dept. of Radiology and Oncology, Faculdade de Medicina da Universidade de São Paulo and Instituto do Câncer do Estado de São Paulo, Brazil
| | - Mayara D'Auria Jacomassi
- Center for Translational Research in Oncology (LIM24), Dept. of Radiology and Oncology, Faculdade de Medicina da Universidade de São Paulo and Instituto do Câncer do Estado de São Paulo, Brazil
| | - Andréia Hanada Otake
- Center for Translational Research in Oncology (LIM24), Dept. of Radiology and Oncology, Faculdade de Medicina da Universidade de São Paulo and Instituto do Câncer do Estado de São Paulo, Brazil
| | - Roger Chammas
- Center for Translational Research in Oncology (LIM24), Dept. of Radiology and Oncology, Faculdade de Medicina da Universidade de São Paulo and Instituto do Câncer do Estado de São Paulo, Brazil.
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13
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Huang Y, Wang Y, Li X, Chen Z, Li X, Wang H, Ni M, Li J. Molecular mechanism of ER stress-induced gene expression of tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) in macrophages. FEBS J 2015; 282:2361-78. [PMID: 25827060 DOI: 10.1111/febs.13284] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2014] [Revised: 02/12/2015] [Accepted: 03/26/2015] [Indexed: 12/13/2022]
Abstract
Tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) is a member of the tumor necrosis factor superfamily, whose members are capable of inducing apoptosis and inflammation. Endoplasmic reticulum stress (ERS) plays a key role in immune surveillance in macrophages. TRAIL mRNA and protein expression have previously been detected in macrophages; however, whether ERS has any effects on TRAIL expression in macrophages has not yet been determined. Here, we demonstrate that thapsigargin (TG) and tunicamycin (TM), two ERS inducers activated macrophages were able to increase TRAIL mRNA and protein expression in RAW264.7 macrophages, the culture supernatant of THP-1 cells, and mouse peritoneal macrophages, indicating that ERS as a potent inducer of TRAIL transcription and expression in macrophages. This effect was blocked by the specific JNK inhibitor SP600125 and transcription factor AP-1 inhibitor SR 1130. Interestingly, at the molecular level, regulation of TRAIL expression by ERS was accompanied by a significant decrease in cytokine signaling suppressor 3 (SOCS3). SOCS3 siRNA clearly increased the expression of TRAIL mRNA and protein under ERS by activating the AP-1 components phosphorylated c-Jun and phosphorylated c-Fos in RAW264.7 cells. In contrast, over-expression of SOCS3 reversed ERS-induced TRAIL expression. These findings provide in vitro evidence that SOCS3 plays a critical negative role in the regulation of ERS-induced TRAIL expression via the Jun N-terminal kinase/AP-1 signaling pathway in macrophages.
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Affiliation(s)
- Yan Huang
- School of Pharmacy, Anhui Key Laboratory of Bioactivity of Natural Products, Anhui Medical University, Hefei, China.,Institute for Liver Diseases of Anhui Medical University, Anhui Medical University, Hefei, China
| | - Yarui Wang
- School of Pharmacy, Anhui Key Laboratory of Bioactivity of Natural Products, Anhui Medical University, Hefei, China.,Institute for Liver Diseases of Anhui Medical University, Anhui Medical University, Hefei, China
| | - Xiaofeng Li
- School of Pharmacy, Anhui Key Laboratory of Bioactivity of Natural Products, Anhui Medical University, Hefei, China.,Institute for Liver Diseases of Anhui Medical University, Anhui Medical University, Hefei, China
| | - Zhaolin Chen
- School of Pharmacy, Anhui Key Laboratory of Bioactivity of Natural Products, Anhui Medical University, Hefei, China.,Institute for Liver Diseases of Anhui Medical University, Anhui Medical University, Hefei, China
| | - Xiaohui Li
- School of Pharmacy, Anhui Key Laboratory of Bioactivity of Natural Products, Anhui Medical University, Hefei, China.,Institute for Liver Diseases of Anhui Medical University, Anhui Medical University, Hefei, China
| | - Huan Wang
- School of Pharmacy, Anhui Key Laboratory of Bioactivity of Natural Products, Anhui Medical University, Hefei, China.,Institute for Liver Diseases of Anhui Medical University, Anhui Medical University, Hefei, China
| | - Mingming Ni
- School of Pharmacy, Anhui Key Laboratory of Bioactivity of Natural Products, Anhui Medical University, Hefei, China.,Institute for Liver Diseases of Anhui Medical University, Anhui Medical University, Hefei, China
| | - Jun Li
- School of Pharmacy, Anhui Key Laboratory of Bioactivity of Natural Products, Anhui Medical University, Hefei, China.,Institute for Liver Diseases of Anhui Medical University, Anhui Medical University, Hefei, China
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Abstract
Systemic lupus erythematosus (SLE) is an autoimmune disease with uncertain pathogenesis. Endoplasmic reticulum (ER) stress has close correlations with inflammation and/or immune diseases. However, it is unknown whether aberrant ER stress is involved in SLE pathogenesis. We aimed to characterize the ER stress-related genes in patients with SLE and analyzed their correlations with the disease. Peripheral blood leucocytes were isolated from 76 well-characterized patients with SLE and 69 healthy controls. ER stress-related genes were determined at transcription level by absolute quantitative real-time polymerase chain reaction. Stepwise regression and correlation analysis were used to analyze the relationships between SLE disease and ER stress. Abnormal unfolded protein responses were found in patients with SLE with the downregulation of inositol-requiring enzyme 1 (IRE1), pancreatic ER kinase (PERK) and CCAAT/enhancer-binding protein homologous protein (CHOP) and upregulation of XBP1, XBP1s and MANF. In the patients with SLE disease activity index (SLEDAI) <12, PERK and MANF expressions were significantly decreased, compared with the patients with severe SLE (SLEDAI ≥ 12). However, there was no significant change in ATF6 mRNA expression in the patients with SLE. Negative correlation between IRE1/XBP1 and SLEDAI was observed in lower SLEDAI score group. Negative correlations between CHOP and anti-dsDNA antibody, MANF and antinuclear antibody were observed in high-SLEDAI score group. We also found that antinuclear antibody and anti-dsDNA antibodies correlated with SLEDAI in a weak positive manner. SLEDAI was negatively related with C3 level. SLEDAI and anti-dsDNA antibody showed modestly positive correlation with urine protein. These findings suggest that the abnormal unfolded protein responses, especially IRE1/XBP1 and PERK/CHOP axes, may contribute to SLE pathogenesis, which may be potential diagnosis indicators or treatment targets.
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15
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Mardones P, Martínez G, Hetz C. Control of systemic proteostasis by the nervous system. Trends Cell Biol 2014; 25:1-10. [PMID: 25174273 DOI: 10.1016/j.tcb.2014.08.001] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2014] [Revised: 08/01/2014] [Accepted: 08/04/2014] [Indexed: 10/24/2022]
Abstract
Maintenance of organismal homeostasis depends on the integration of intracellular and external signals, involving the ability to detect molecular perturbations. An explosion of studies in model organisms indicates the occurrence of dynamic communication between alarm pathways engaged by protein-folding stress in neurons that activate adaptive programs in peripheral organs to control cellular proteostasis. Here we review emerging concepts that highlight the contribution of the proteostasis network to the regulation of several aspects of animal physiology through central integration of signals spanning multiple tissues and organs. These recent findings uncover a new layer of functional interrelation between cells that handle and orchestrate the global maintenance of the proteome at the organismal level in a cell-nonautonomous manner.
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Affiliation(s)
- Pablo Mardones
- Biomedical Neuroscience Institute, Faculty of Medicine, University of Chile, Santiago, Chile; Program of Cellular and Molecular Biology, Center for Molecular Studies of the Cell, Institute of Biomedical Sciences, University of Chile, Santiago, Chile
| | - Gabriela Martínez
- Biomedical Neuroscience Institute, Faculty of Medicine, University of Chile, Santiago, Chile; Program of Cellular and Molecular Biology, Center for Molecular Studies of the Cell, Institute of Biomedical Sciences, University of Chile, Santiago, Chile
| | - Claudio Hetz
- Biomedical Neuroscience Institute, Faculty of Medicine, University of Chile, Santiago, Chile; Program of Cellular and Molecular Biology, Center for Molecular Studies of the Cell, Institute of Biomedical Sciences, University of Chile, Santiago, Chile; Neurounion Biomedical Foundation, CENPAR, Santiago, Chile; Department of Immunology and Infectious diseases, Harvard School of Public Health, Boston, MA, USA.
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16
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Abstract
PURPOSE OF REVIEW Loss of cell growth control is not sufficient to explain why tumours form as the immune system recognizes many malignant cells and keeps them in check. The local inflammatory microenvironment is a pivotal factor in tumour formation, as tumour-associated inflammation actively suppresses antitumour immunity. The purpose of this review is to evaluate emerging evidence that amino acid catabolism is a key feature of tumour-associated inflammation that supports tumour progression and immune resistance to therapy. RECENT FINDINGS Enhanced amino acid catabolism in inflammatory tumour microenvironments correlates with carcinogen resistance and immune regulation mediated by tumour-associated immune cells that protect tumours from natural and vaccine-induced immunity. Interfering with metabolic pathways exploited by tumours is a promising antitumour strategy, especially when combined with other therapies. Moreover, molecular sensors that evolved to detect pathogens may enhance evasion of immune surveillance to permit tumour progression. SUMMARY Innate immune sensing that induces amino acid catabolism in tumour microenvironments may be pivotal in initiating and sustaining local inflammation that promotes immune resistance and attenuates antitumour immunity. Targeting molecular sensors that mediate these metabolic changes may be an effective strategy to enhance antitumour immunity that prevents tumour progression, as well as improving the efficacy of cancer therapy.
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17
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Khatami M. Chronic Inflammation: Synergistic Interactions of Recruiting Macrophages (TAMs) and Eosinophils (Eos) with Host Mast Cells (MCs) and Tumorigenesis in CALTs. M-CSF, Suitable Biomarker for Cancer Diagnosis! Cancers (Basel) 2014; 6:297-322. [PMID: 24473090 PMCID: PMC3980605 DOI: 10.3390/cancers6010297] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2013] [Revised: 01/08/2014] [Accepted: 01/14/2014] [Indexed: 01/06/2023] Open
Abstract
Ongoing debates, misunderstandings and controversies on the role of inflammation in cancer have been extremely costly for taxpayers and cancer patients for over four decades. A reason for repeated failed clinical trials (90% ± 5 failure rates) is heavy investment on numerous genetic mutations (molecular false-flags) in the chaotic molecular landscape of site-specific cancers which are used for "targeted" therapies or "personalized" medicine. Recently, unresolved/chronic inflammation was defined as loss of balance between two tightly regulated and biologically opposing arms of acute inflammation ("Yin"-"Yang" or immune surveillance). Chronic inflammation could differentially erode architectural integrities in host immune-privileged or immune-responsive tissues as a common denominator in initiation and progression of nearly all age-associated neurodegenerative and autoimmune diseases and/or cancer. Analyses of data on our "accidental" discoveries in 1980s on models of acute and chronic inflammatory diseases in conjunctival-associated lymphoid tissues (CALTs) demonstrated at least three stages of interactions between resident (host) and recruited immune cells: (a), acute phase; activation of mast cells (MCs), IgE Abs, histamine and prostaglandin synthesis; (b), intermediate phase; down-regulation phenomenon, exhausted/degranulated MCs, heavy eosinophils (Eos) infiltrations into epithelia and goblet cells (GCs), tissue hypertrophy and neovascularization; and (c), chronic phase; induction of lymphoid hyperplasia, activated macrophages (Mfs), increased (irregular size) B and plasma cells, loss of integrity of lymphoid tissue capsular membrane, presence of histiocytes, follicular and germinal center formation, increased ratios of local IgG1/IgG2, epithelial thickening (growth) and/or thinning (necrosis) and angiogenesis. Results are suggestive of first evidence for direct association between inflammation and identifiable phases of immune dysfunction in the direction of tumorigenesis. Activated MFs (TAMs or M2) and Eos that are recruited by tissues (e.g., conjunctiva or perhaps lung airways) whose principal resident immune cells are MCs and lymphocytes are suggested to play crucial synergistic roles in enhancing growth promoting capacities of host toward tumorigenesis. Under oxidative stress, M-CSF may produce signals that are cumulative/synergistic with host mediators (e.g., low levels of histamine), facilitating tumor-directed expression of decoy receptors and immune suppressive factors (e.g., dTNFR, IL-5, IL-10, TGF-b, PGE2). M-CSF, possessing superior sensitivity and specificity, compared with conventional markers (e.g., CA-125, CA-19-9) is potentially a suitable biomarker for cancer diagnosis and technology development. Systematic monitoring of interactions between resident and recruited cells should provide key information not only about early events in loss of immune surveillance, but it would help making informed decisions for balancing the inherent tumoricidal (Yin) and tumorigenic (Yang) properties of immune system and effective preventive and therapeutic approaches and accurate risk assessment toward improvement of public health.
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Affiliation(s)
- Mahin Khatami
- Inflammation and Cancer Biology, National Cancer Institute (Ret), the National Institutes of Health, Bethesda, MD 20817, USA.
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